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AES 高级加密标准（英语：Advanced Encryption Standard，缩写：AES），在密码学中又称Rijndael加密法，是美国联邦政府采用的一种区块加密标准。这个标准用来替代原先的DES，已经被多方分析且广为全世界所使用。AES先进加密算法是一向被认为牢不可破的加密算法，针对这项加密算法的攻击是异常复杂的，事实上想要完全破解AES花费的时间要以数十亿年计，极大的保证了数据的安全性。 这里有两个加密、解密方法： 一种是带密钥的加密；一种是动态加密，就是不需要密钥，密钥被动态生成并且保存在密文中，解密时先解密密钥，在解密密文。 using System;
using System.Security.Cryptography;
using System.Text;
namespace Common.CryptHelper
{
public class AESCrypt
{
public const string RET_ERROR = "x07x07x07x07x07";
private byte[] _IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
private byte[] _Key = { 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };
private const string CRYPTO_KEY = "ADVANCEDENCRYPTIONSTANDARD";
private int CRYPTO_KEY_LENGTH = 32;
private AesCryptoServiceProvider m_aesCryptoServiceProvider;
private string m_message;
public string Message
{
get { return m_message; }
set { m_message = value; }
}
private bool m_containKey;
/// <summary>
/// True：密文中包含密钥
/// False：密文中不包含密钥
/// </summary>
public bool ContainKey
{
get { return m_containKey; }
set { m_containKey = value; }
}
public AESCrypt()
{
m_aesCryptoServiceProvider = new AesCryptoServiceProvider();
m_containKey = true;
m_message = string.Empty;
}
public AESCrypt(bool containKey)
: this()
{
m_containKey = containKey;
}
private string Encrypt(string s_crypto, byte[] key)
{
string s_encryped = string.Empty;
byte[] crypto, encrypted;
ICryptoTransform ct;
try
{
crypto = string2Byte(s_crypto);
m_aesCryptoServiceProvider.Key = key;
m_aesCryptoServiceProvider.IV = _IV;
ct = m_aesCryptoServiceProvider.CreateEncryptor();
encrypted = ct.TransformFinalBlock(crypto, 0, crypto.Length);
if (m_containKey)
{
s_encryped += byte2HexString(key);
}
s_encryped += byte2HexString(encrypted);
return s_encryped;
}
catch (Exception ex)
{
m_message = ex.ToString();
return RET_ERROR;
}
}
private string Decrypt(string s_encrypted, byte[] key)
{
string s_decrypted = string.Empty;
byte[] encrypted, decrypted;
ICryptoTransform ct;
try
{
encrypted = hexString2Byte(s_encrypted);
m_aesCryptoServiceProvider.Key = key;
m_aesCryptoServiceProvider.IV = _IV;
ct = m_aesCryptoServiceProvider.CreateDecryptor();
decrypted = ct.TransformFinalBlock(encrypted, 0, encrypted.Length);
s_decrypted += byte2String(decrypted);
return s_decrypted;
}
catch (Exception ex)
{
m_message = ex.ToString();
m_message = "Decrypt fail.";
return RET_ERROR;
}
}
#region 指定密钥对明文进行AES加密、解密
/// <summary>
/// 指定密钥对明文进行AES加密
/// </summary>
/// <param name="s_crypto">明文</param>
/// <param name="s_key">加密密钥</param>
/// <returns></returns>
public string Encrypt(string s_crypto, string s_key)
{
byte[] key = new byte[CRYPTO_KEY_LENGTH];
byte[] temp = string2Byte(s_key);
if (temp.Length > key.Length)
{
m_message = "Key too long,need less than 32 Bytes key.";
return RET_ERROR;
}
key = string2Byte(s_key.PadRight(key.Length));
return Encrypt(s_crypto, key);
}
/// <summary>
/// 指定密钥，并对密文进行解密
/// </summary>
/// <param name="s_encrypted">密文</param>
/// <param name="s_key">密钥</param>
/// <returns></returns>
public string Decrypt(string s_encrypted, string s_key)
{
byte[] key = new byte[CRYPTO_KEY_LENGTH];
byte[] temp = string2Byte(s_key);
if (temp.Length > key.Length)
{
m_message = "Key invalid.too long,need less than 32 Bytes";
return RET_ERROR;
}
key = string2Byte(s_key.PadRight(key.Length));
if (m_containKey)
{
s_encrypted = s_encrypted.Substring(CRYPTO_KEY_LENGTH * 2);
}
return Decrypt(s_encrypted, key);
}
#endregion
#region 动态生成密钥，并对明文进行AES加密、解密
/// <summary>
/// 动态生成密钥，并对明文进行AES加密
/// </summary>
/// <param name="s_crypto">明文</param>
/// <returns></returns>
public string Encrypt(string s_crypto)
{
byte[] key = new byte[CRYPTO_KEY_LENGTH];
m_aesCryptoServiceProvider.GenerateKey();
key = m_aesCryptoServiceProvider.Key;
return Encrypt(s_crypto, key);
}
/// <summary>
/// 从密文中解析出密钥，并对密文进行解密
/// </summary>
/// <param name="s_encrypted">密文</param>
/// <returns></returns>
public string Decrypt(string s_encrypted)
{
string s_key = string.Empty;
byte[] key = new byte[CRYPTO_KEY_LENGTH];
if (s_encrypted.Length <= CRYPTO_KEY_LENGTH * 2)
{
m_message = "Encrypted string invalid.";
return RET_ERROR;
}
if (m_containKey)
{
s_key = s_encrypted.Substring(0, CRYPTO_KEY_LENGTH * 2);
s_encrypted = s_encrypted.Substring(CRYPTO_KEY_LENGTH * 2);
}
key = hexString2Byte(s_key);
return Decrypt(s_encrypted, key);
}
#endregion
#region 私有方法
private string byte2HexString(byte[] bytes)
{
StringBuilder sb = new StringBuilder();
foreach (byte b in bytes)
{
sb.AppendFormat("{0:X2}", b);
}
return sb.ToString();
}
private byte[] hexString2Byte(string hex)
{
int len = hex.Length / 2;
byte[] bytes = new byte[len];
for (int i = 0; i < len; i++)
{
bytes[i] = (byte)(Convert.ToInt32(hex.Substring(i * 2, 2), 16));
}
return bytes;
}
private byte[] string2Byte(string str)
{
return Encoding.UTF8.GetBytes(str);
}
private string byte2String(byte[] bytes)
{
return Encoding.UTF8.GetString(bytes);
}
#endregion
}
}
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
DES 数据加密标准（DES，Data Encryption Standard）是一种对称加密算法，很可能是使用最广泛的密钥系统，特别是在保护金融数据的安全中，是安全性比较高的一种算法，目前只有一种方法可以破解该算法，那就是穷举法。 using System;
using System.Security.Cryptography;
using System.Text;
namespace Common.CryptHelper
{
/// <summary>
/// DES加密/解密类。
/// </summary>
public class DESEncrypt
{
#region ========加密========
/// <summary>
/// 加密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Encrypt(string Text, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray;
inputByteArray = Encoding.Default.GetBytes(Text);
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
return ret.ToString();
}
#endregion
#region ========解密========
/// <summary>
/// 解密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Decrypt(string Text, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len;
len = Text.Length / 2;
byte[] inputByteArray = new byte[len];
int x, i;
for (x = 0; x < len; x++)
{
i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
System.IO.MemoryStream ms = new System.IO.MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
return Encoding.Default.GetString(ms.ToArray());
}
#endregion
}
}
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
RSA RSA是第一个既能用于数据加密也能用于数字签名的算法。它易于理解和操作，也很流行。算法的名字以发明者的名字命名：Ron Rivest, Adi Shamir 和Leonard Adleman。但RSA的安全性一直未能得到理论上的证明。它经历了各种攻击，至今未被完全攻破。今天只有短的RSA钥匙才可能被强力方式解破。到2008年为止，世界上还没有任何可靠的攻击RSA算法的方式。只要其钥匙的长度足够长，用RSA加密的信息实际上是不能被解破的。但在分布式计算和量子计算机理论日趋成熟的今天，RSA加密安全性受到了挑战。 using System;
using System.Text;
using System.Security.Cryptography;
namespace Common.CryptHelper
{
/// <summary>
/// RSA加密解密及RSA签名和验证
/// </summary>
public class RSACryption
{
public RSACryption()
{
}
#region RSA 加密解密
#region RSA 的密钥产生
/// <summary>
/// RSA 的密钥产生 产生私钥 和公钥
/// </summary>
/// <param name="xmlKeys"></param>
/// <param name="xmlPublicKey"></param>
public void RSAKey(out string xmlKeys,out string xmlPublicKey)
{
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
xmlKeys=rsa.ToXmlString(true);
xmlPublicKey = rsa.ToXmlString(false);
}
#endregion
#region RSA的加密函数
//##############################################################################
//RSA 方式加密
//说明KEY必须是XML的行式,返回的是字符串
//在有一点需要说明！！该加密方式有 长度 限制的！！
//##############################################################################
//RSA的加密函数 string
public string RSAEncrypt(string xmlPublicKey,string m_strEncryptString )
{
byte[] PlainTextBArray;
byte[] CypherTextBArray;
string Result;
RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPublicKey);
PlainTextBArray = (new UnicodeEncoding()).GetBytes(m_strEncryptString);
CypherTextBArray = rsa.Encrypt(PlainTextBArray, false);
Result=Convert.ToBase64String(CypherTextBArray);
return Result;
}
//RSA的加密函数 byte[]
public string RSAEncrypt(string xmlPublicKey,byte[] EncryptString )
{
byte[] CypherTextBArray;
string Result;
RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPublicKey);
CypherTextBArray = rsa.Encrypt(EncryptString, false);
Result=Convert.ToBase64String(CypherTextBArray);
return Result;
}
#endregion
#region RSA的解密函数
//RSA的解密函数 string
public string RSADecrypt(string xmlPrivateKey, string m_strDecryptString )
{
byte[] PlainTextBArray;
byte[] DypherTextBArray;
string Result;
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPrivateKey);
PlainTextBArray =Convert.FromBase64String(m_strDecryptString);
DypherTextBArray=rsa.Decrypt(PlainTextBArray, false);
Result=(new UnicodeEncoding()).GetString(DypherTextBArray);
return Result;
}
//RSA的解密函数 byte
public string RSADecrypt(string xmlPrivateKey, byte[] DecryptString )
{
byte[] DypherTextBArray;
string Result;
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPrivateKey);
DypherTextBArray=rsa.Decrypt(DecryptString, false);
Result=(new UnicodeEncoding()).GetString(DypherTextBArray);
return Result;
}
#endregion
#endregion
#region RSA数字签名
#region 获取Hash描述表
//获取Hash描述表
public bool GetHash(string m_strSource, ref byte[] HashData)
{
//从字符串中取得Hash描述
byte[] Buffer;
System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(m_strSource);
HashData = MD5.ComputeHash(Buffer);
return true;
}
//获取Hash描述表
public bool GetHash(string m_strSource, ref string strHashData)
{
//从字符串中取得Hash描述
byte[] Buffer;
byte[] HashData;
System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(m_strSource);
HashData = MD5.ComputeHash(Buffer);
strHashData = Convert.ToBase64String(HashData);
return true;
}
//获取Hash描述表
public bool GetHash(System.IO.FileStream objFile, ref byte[] HashData)
{
//从文件中取得Hash描述
System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
HashData = MD5.ComputeHash(objFile);
objFile.Close();
return true;
}
//获取Hash描述表
public bool GetHash(System.IO.FileStream objFile, ref string strHashData)
{
//从文件中取得Hash描述
byte[] HashData;
System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
HashData = MD5.ComputeHash(objFile);
objFile.Close();
strHashData = Convert.ToBase64String(HashData);
return true;
}
#endregion
#region RSA签名
//RSA签名
public bool SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, ref byte[] EncryptedSignatureData)
{
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
RSA.FromXmlString(p_strKeyPrivate);
System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法为MD5
RSAFormatter.SetHashAlgorithm("MD5");
//执行签名
EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
return true;
}
//RSA签名
public bool SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, ref string m_strEncryptedSignatureData)
{
byte[] EncryptedSignatureData;
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
RSA.FromXmlString(p_strKeyPrivate);
System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法为MD5
RSAFormatter.SetHashAlgorithm("MD5");
//执行签名
EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData);
return true;
}
//RSA签名
public bool SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, ref byte[] EncryptedSignatureData)
{
byte[] HashbyteSignature;
HashbyteSignature = Convert.FromBase64String(m_strHashbyteSignature);
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
RSA.FromXmlString(p_strKeyPrivate);
System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法为MD5
RSAFormatter.SetHashAlgorithm("MD5");
//执行签名
EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
return true;
}
//RSA签名
public bool SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, ref string m_strEncryptedSignatureData)
{
byte[] HashbyteSignature;
byte[] EncryptedSignatureData;
HashbyteSignature = Convert.FromBase64String(m_strHashbyteSignature);
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
RSA.FromXmlString(p_strKeyPrivate);
System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法为MD5
RSAFormatter.SetHashAlgorithm("MD5");
//执行签名
EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);
m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData);
return true;
}
#endregion
#region RSA 签名验证
public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, byte[] DeformatterData)
{
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
RSA.FromXmlString(p_strKeyPublic);
System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
//指定解密的时候HASH算法为MD5
RSADeformatter.SetHashAlgorithm("MD5");
if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
{
return true;
}
else
{
return false;
}
}
public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, byte[] DeformatterData)
{
byte[] HashbyteDeformatter;
HashbyteDeformatter = Convert.FromBase64String(p_strHashbyteDeformatter);
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
RSA.FromXmlString(p_strKeyPublic);
System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
//指定解密的时候HASH算法为MD5
RSADeformatter.SetHashAlgorithm("MD5");
if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
{
return true;
}
else
{
return false;
}
}
public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, string p_strDeformatterData)
{
byte[] DeformatterData;
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
RSA.FromXmlString(p_strKeyPublic);
System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
//指定解密的时候HASH算法为MD5
RSADeformatter.SetHashAlgorithm("MD5");
DeformatterData =Convert.FromBase64String(p_strDeformatterData);
if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
{
return true;
}
else
{
return false;
}
}
public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, string p_strDeformatterData)
{
byte[] DeformatterData;
byte[] HashbyteDeformatter;
HashbyteDeformatter = Convert.FromBase64String(p_strHashbyteDeformatter);
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();
RSA.FromXmlString(p_strKeyPublic);
System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
//指定解密的时候HASH算法为MD5
RSADeformatter.SetHashAlgorithm("MD5");
DeformatterData =Convert.FromBase64String(p_strDeformatterData);
if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
{
return true;
}
else
{
return false;
}
}
#endregion
#endregion
}
}
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
HashCode using System;
using System.Text;
using System.Security.Cryptography;
namespace Common.CryptHelper
{
/// <summary>
/// 得到随机安全码（哈希加密）。
/// </summary>
public class HashEncode
{
public HashEncode()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
/// <summary>
/// 得到随机哈希加密字符串
/// </summary>
/// <returns></returns>
public static string GetSecurity()
{
string Security = HashEncoding(GetRandomValue());
return Security;
}
/// <summary>
/// 得到一个随机数值
/// </summary>
/// <returns></returns>
public static string GetRandomValue()
{
Random Seed = new Random();
string RandomVaule = Seed.Next(1, int.MaxValue).ToString();
return RandomVaule;
}
/// <summary>
/// 哈希加密一个字符串
/// </summary>
/// <param name="Security"></param>
/// <returns></returns>
public static string HashEncoding(string Security)
{
byte[] Value;
UnicodeEncoding Code = new UnicodeEncoding();
byte[] Message = Code.GetBytes(Security);
SHA512Managed Arithmetic = new SHA512Managed();
Value = Arithmetic.ComputeHash(Message);
Security = "";
foreach(byte o in Value)
{
Security += (int) o + "O";
}
return Security;
}
}
}
常用的一些加密算法，留备。会继续为大家分享一些 常用的 公共帮助类。
原创文章 转载请尊重劳动成果 http://yuangang.cnblogs.com AES 高级加密标准（英语：Advanced Encryption Standard，缩写：AES），在密码学中又称Rijndael加密法，是美国联邦政府采用的一种区块加密标准。这个标准用来替代原先的DES，已经被多方分析且广为全世界所使用。AES先进加密算法是一向被认为牢不可破的加密算法，针对这项加密算法的攻击是异常复杂的，事实上想要完全破解AES花费的时间要以数十亿年计，极大的保证了数据的安全性。 这里有两个加密、解密方法： 一种是带密钥的加密；一种是动态加密，就是不需要密钥，密钥被动态生成并且保存在密文中，解密时先解密密钥，在解密密文。 using System;
using System.Security.Cryptography;
using System.Text;
namespace Common.CryptHelper
{
public class AESCrypt
{
public const string RET_ERROR = "x07x07x07x07x07";
private byte[] _IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF |
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